Reversible drums



June 12, 1923. 1,458,554

A. H. SKAER ET AL REVERSIBLE DRUMS Filed Sept. 12 1922 2 Sheets-Sheet 1A. H. SKAER ET AL June 12, 1923.

REVERSIBLE nauus 2 Sheets-Sheet 2 Filed Sept. 12

drawings, wherein Patented June 12, 1923 UNITED STATES PATENT OFFICE.

ARTHUR H. SKAEB, THEODORE E. BARKER, AND OMAR E. CLARK, OF DENVER, COLO-RAD O, ASSIGNOBS TOTHE DENVER ROCK DRILL MANUFACTURING COMPANY, OFDENVER, COLORADO, A CORPORATION OF DELAWARE.

REVERSIBLE DRUMS.

Application filed September 12, 1922. Serial No. 587,803.

Toall'wlwmitmay comm: is rotatably mounted a head 24 carried by 65 Be itknown that we, ARTHUR H. SKAER, the shaft 14. The flanges are providedon THEODORE BARKER, and OMAR E CL RK, their internal annular faces withratchet citizens ofthe United States, resldin at teeth 25, the teeth ofone drum being set 6 Denver, in the county of Denver and tate reverselyto the teeth of the other, as indiof Colorado, have invented certaln newand cated by the dotted and full lines in F iguseful Improvements inReversible Drums, ure 2. The head 24 terminates in a transof which thefollowing is a speclfication. verse pivot 26, and mounted thereon is aThe present invention relates to wmdmg double pawl 27 that thus turns onan i 10 drum mechanism of the type in WhlCh two arallel to the axes ofthe shafts and drums.

drums are employed, driven from a. comreferably this pawl has an oen-sided mon prime mover. I socket 28 to-receive the pivot 26. he pawlThe preferred embodiment of the mven- 1s provlded with opposite ofi'setteeth 29, tion is illustrated in the accompanying each of which coactswith the opposite ratchet teeth of the'drum flanges. It will Figure 1 isa longitudinal sectional View thus be seen that if one of the teeth 29is through the improved structure, in interlocked abutting relation withone Figure 2 is a cross sectional view on the of the teeth 25 of one ofthe drums, the i 2 2 f Fi 1, other tooth 29 Wlll be out of coaction withm Figure 3 is a similar view on the line the oppositely set teeth of theother drum 33 of 'Figure 1, and vice versa. Itwill furthermore be aFigure 4 is a detail perspective view of parent that if the shaft 14 isrotated in one th direction one of the drums will be clutched Figure 5is a detail perspective view of thereto, whlle the other will be free.Upon 25 the actuating means for one of the brake a reverse rotation ofthe shaft the pawl will d automatically swing so as to bring theother Inthe embodiment disclosed, a base 5 is tooth into coaction with theratchet teeth of employed having spaced supports 6 and 7. the other drumwhile the first mentioned The support 6 carries a suitable reversiblepawl tooth will be released and the drum 30 motor 8, which may be of anywell-known or free to rotate.

desired character. The support 7 is pro- In order to control themovement ofthe g5 vided with a gear casing 9 having a vremov- -drum whenfree the flanges 23 preferably able cover plate 10. constitute braklngsurfaces and brake E t ding b twe th upports 6 and 7 bands 30 arearranged thereupon. Preferes and operated by the motor 8 is a motor ablythesebrake bands are each connected shaft 11 having an anti-frictionbearing 12 at one end, as shown at 31, with a rod 32 in the support 6adjacent to the motor 8 and plvotally mounted, as shown at 33 on thehaving an anti-friction bearing 13 in the base, Whlle the other end isfastened as illusg v r lat 10, Thi shaft is surrounded trated at 34 to asleeve 35 slidable upon the an by a tu ular shaft 14 having rollerbearings rod. A nut 36 adjustably threaded on the 15 i the su ort 6 and7. The shaft 11 free end of the rod 32 bears upon the sleeve carries apinion 16 meshing-with a gear 17 and s provided with a handle knob 37.By that is located in the gear case 9 and said turnmg th1snut the brakeband can be gear 17 has secured thereto a pinion 18 lghtened orloosened, as desired.

45 meshing with a gear 19 that is fixed with From the foregoing, it isthought that the relation to a pinion 20. The pinion 20 is inconstructlon, operation and many advanmesh with a gear wheel 21 fixed t0the tubutages of the herein described invention will lar shaft 14. Itwill thus be evident that the be apparent to those skilled in the art,withshaft 14 may be driven in either of opposite out further descriptionand it will be underto directions from the motor and'at a reduced stoodthat various changes in the size, shape,

speed. proportion and minor details of construction Journaled upon theshaft 14 are independmay be resorted to without departing from ent drums22 having on their adjacent ends the spirit or sacrificing any of theadvanfianges 23 forming a housing, within which tages of the invention.

--.Having thus fully described our invention, what we claim as new, anddesire to secure b Letters Patent, is

1. Thecombination with a air of oppositely rotatable driven members, ofa driving member common thereto and rotatable inopposite directions, anda clutch member movable with the. driving member and pivoted thereon onan axis that is parallelto the axis .of rotation'of the driving member,said clutch member being movable to a position. to connect one ortheother of the driven members to the driving member accordingly as thelater is moved in one direction or the other.

2. The combination with a driving shaft, and dru s rotatable thereabont,of a clutch element ivotally mounted on the shaft on an axis parallel tothe axes of rotation of the drums and shaft and having portions onopposite sides. of its axis of rotation that are alternately movablerespectively into and out of engagement with the drums accordingly asthe direction of rotation of the shaft is reversed. I a

3. The combination with a. reversible rotatable driving shaft, of alinedseparate drums rotatable thereabout and havlng adjacent flanged endsprovided with internal inset oppositely disposed ratchet teeth, a headon theshaft extending between the drums within the adjacent flangesthereof, and a double pawl pivotedbetween its ends on the free .end ofthe head parallel to the axis of the

